Air quality index [µg/m3]:
excellent ≤ 20
good ≤ 60
lightly polluted ≤ 100
moderately polluted ≤ 140
heavily polluted ≤ 200
severely polluted > 200
PM 2.5
[µg/m3]
PM 10
HOUR OPOLSKA ST. ROOF (BEFORE FILTERS)  AIR SUPPLIED TO OFFICES
060040goodexcellent51excellent
050045goodexcellent61excellent
040045goodexcellent71excellent
030041goodexcellent71excellent
020044goodexcellent71excellent
010054goodexcellent71excellent
000051goodexcellent91excellent
230059goodexcellent81excellent
220046goodexcellent71excellent
210042goodexcellent51excellent
200051goodexcellent91excellent
190047goodexcellent71excellent
180026goodexcellent51excellent
170037goodexcellent61excellent
160029goodexcellent61excellent
150029goodexcellent51excellent
140027goodexcellent51excellent
130031goodexcellent61excellent
120033goodexcellent61excellent
110030goodexcellent51excellent
100042goodexcellent91excellent
090097lightly pollutedexcellent201excellent
0800153heavily pollutedgood291excellent
0700176heavily pollutedgood291excellent